What does 1110 midbrain, pons, and medulla mean?
1110 Midbrain, Pons, and Medulla: Anatomy and Syndromes The anatomy of the brainstem is complex. It contains numerous cranial nerve nuclei and is traversed by multiple tracts between the brain and spinal cord. Improved MRI resolution now allows the radiologist to identify a higher level of anatomic detail, but an un-
What are the symptoms of damage to the midbrain?
Any lesion within the midbrain (stroke, tumor, inflammation, infection) may damage the oculomotor nerve, resulting in an eye that is positioned in a downward and outward direction. Other symptoms of an oculomotor nerve palsy include: 1 . A dilated pupil. Droopy eyelid. Diplopia (double vision) Inability to accommodate.
What are the two transverse sections of the midbrain?
Two transverse sections of the midbrain will be discussed: the level of the inferior colliculus, and the level of the superior colliculus. Level of the Inferior Colliculus The anteriolateral surface of the midbrain houses the paired crus cerebri. Four fibre tracts run within the crus:
Which is infarct of the tegmentum of the midbrain?
Benedikt syndrome (paramedian midbrain syndrome) is an infarct of the tegmentum of the midbrain due to occlusion of branches of the posterior cerebral artery supplying the fascicles of the oculomotor nerve and red nucleus ( Fig 5 ).
Where is the midbrain located in the CNS?
Midbrain. The midbrain is a portion of the brainstem, positioned above the pons, at the very top of the brainstem, directly underneath the cerebellum. This is one of the most important components of the central nervous system (CNS), as all neuronal transmissions that pass through the body, throughout the peripheral nervous system (PNS)
Which is the most important part of the midbrain?
Anatomy and Functions of the Midbrain 1 Tegmentum. The tegmentum is an area of gray matter surrounding the cerebral aqueduct and is one of the most superior regions of the midbrain, positioned anteriorly to the tectum. 2 Red Nucleus. 3 Periaqueductal Gray. 4 Substantia Nigra. 5 Tectum. 6 Crus Cerebri.
How is Millard-Gubler syndrome localizes to the pons?
Use of the Maddox Rod and a penlight can help the clinician disentangle the direction in which the eyes are disconjugate. 31 The Millard-Gubler syndrome localizes to the pons with its facial palsy (CN VII) and sometimes lateral rectus palsy (CN VI, another way to achieve diplopia).